Hollow building-block.



'PATENTED NOV. 1-7, 1903.

H. L. BYNUM. HOLLOW BUILDING BLOCK.

APPLICATION FILED JAN. 30, 1903.

2 SHEETS-SHEET 1,

N0 MODEL.

No. 744,480. PATENTED NOV; 17, 1903.

' H. L. BYNUM.

HOLLOW BUILDING BLOCK.

APPLICATION FILED JAN. so. 1903. NO MODEL. 2 SHEETS-SHEET z.

lint rm Mao mi-shims mm: m7. mom-LN. wmmorou. u. c.

UNITED STATES fP atented November 17, 1903.

HENRY L. BYNUM, OE BRAZIL, INDIANA.

HOLLOW BUILDING-BLOCK;

SPECIFICATION. forming part of Letters Patent No. 744,480, dated November 17, 1903.

Application filed January 3051903- Serial No. 141,133. (No model.)

T0 at whom it may concern;

zen of the United States, residing at Brazil,

in the county of Clay and State of Indiana,

this character provided with an air-proof andwaterproof mortar-joint and having the partitions or walls forming such joint laterally braced and supported, when the block is of such a size to require such support.

To this end my invention is embodied in the construction hereinafter described and claimed.

The block is illustrated in the accompany ing drawings, in which Figure 1 is a perspective View of my improved building-block, looking at the end Fig. 2 is a horizontal longitudinal section, and Fig. 3-shows a wall built of my blocks.

Referring to the drawings, 1 is the top wall of the block, and 2 the bottom thereof. blocks range from six inches to thirty-six inches in length, and theouter side walls 3 are preferably from one-half'inch to one and one-half inches in-thickness, according to the size of the block. Within the body of the block are independent inner walls or partitions 4, extending through the length of the brick and of a similar thickness and spaced relatively near to the outer side walls 3, leaving side air-chambers 5 between said inner and outer walls. These inner independent walls are spaced relatively near to the outer walls, so that as great an air-chamber as possible may be left in the center of theblock and yet sufficiently distant therefrom, so that the mortar-joint formed by the ends of these walls, as hereinafter explained, will be fully protected from the outside air and weather by reason of the intervening side air-chambers. We have thus the ordinary hollow buildingblock with-all of its advantages, such as keeping a house warm in winter and cool in summer, owing to the ventilation of the walls These the rain.

i when said walls thereof are formed of such Be it known that I, HENRY I BYNUM, a citi blocks, and a saving in material and cheapness of construction and in the time of construction, owing to the large sizes in which the blocks canbe made, andin addition thereto such a joint as will give the wall built of such blocks a construction as solid as though built of the ordinary small solid brick, for

the reason that the extra inner mortar-joint is fully protected, and therefore permanent, as above stated. Both outer and inner walls are laterally braced and-supported in the larger-sized blocks by a centralhorizontal wall 6, extending from and between the two outer walls and preferably of a similar thickness therewith. The interior hollow partof the larger blocks is thus divided into two large chambers or spaces 7 and 8 and thesmaller side air-chambers 5 into upper and lower chambers. The inner walls; form extra mortar-joints when the bricks or blocks areplaced end to end. The mortar isapplied not only to the end faces of the outer walls3 and top and bottom 1 and 2, but also to the end faces of the inner walls 4, which latter when joined to the walls of an adjacent'block form an extra inner mortar-joint that will be inclosed and will be protected from air and water, and will therefore form a permanent and secure connection and will not be subjected to the ordinary washing-out actionof the mortar by The extra mortaralso adds to the resistance power of the block.

It is thus seen that each tier of a wall or other structure built of my blocks will have a large continuous longitudinal air-chamber throughout its entire length, thus insuringa free circulation of air and a good system of 9O ventilation, but will also be of solid construcouter walls spaced relatively near thereto and arranged longitudinally of said blocks, Whereby the blocks of each of said tiers are divided into large longitudinal air-chambers between said inner walls and small longitudinal airchambers between said inner and outer walls on each side of said blocks, and mortar or cement placed on and in the ends of said side air-chambers on each block forming extra dowels or keys when hardened whereby the blocks of each tier of said wall are securely joined together and their joints protected from the weather, substantially as described.

2. A wall composed of tiers of hollow building-blocks each block being of greater length than its height and width and having a pair of inner walls or partitions parallel to the outer walls spaced relatively near thereto and arranged longitudinallyofsaid blocks, whereby the blocks of each of said tiers are divided into large longitudinal air-chambers between said inner walls and small longitudinal airchambers between said inner and outer walls on each side of said blocks, and mortar or cement placed on and in the ends of said side air-chambers on each block forming extra dowels or keys when hardened whereby the blocks of each tier of said wall are securely joined together and their joints protected from the weather, and a horizontal longitudinal support extending between the outer walls of each block and midway of the said air-chambers, substantially as described.

In testimony whereof I afiix my signature in presence of two witnesses.

HENRY L. BYN UM.

Witnesses:

R. L. SHATTUCK, M. E. REOTOR. 

